Breen graduated from Linganore High SchoolinFrederick, Maryland in 2007.[1] He earned First Team Carroll All-Gazette Football and First Team All-MVAL Chesapeake Conference honors as a center his senior season in 2006.[2][3]
Breen was a four-year starter and a two-year captain for the West Virginia Wesleyan BobcatsofWest Virginia Wesleyan College.[1] He became a starter at center midway through his freshman year and then moved to right tackle the following year. He was then a left tackle his final two years of college.[3] Breen earned Second Team All-WVIAC honors his junior season in 2009.[4] He earned First Team All-WVIAC honors as a left tackle his senior year in 2010 while helping the Bobcats achieve a 9-2 record and the school’s first Top 25 appearance.[1][5][6] He was selected to the 2010 All-American Bowl and the 2011 Cactus Bowl.[1][7] Breen was named the Mick Tingelhoff Award winner as the top offensive lineman at the conclusion of the 2010 All-American Bowl.[1] He also garnered Second Team All-Super Region 1 accolades in 2010.[8] He studied criminal justice and sociology at West Virginia Wesleyan.[9] Breen graduated in 2011.[1]
Breen was assigned to the Philadelphia Soul of the AFL on November 20, 2014.[20] He started seventeen games for the Soul in 2015, earning First Team All-Arena honors. He was also named the Spalding Offensive Lineman of the Year.[6]
^ abGolberg, Stan (December 23, 2010). "Paving his own way". fredericknewspost.com. Archived from the original on September 7, 2011. Retrieved June 18, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^ abc"Shannon Breen". arenafootball.com. Archived from the original on June 18, 2016. Retrieved June 17, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^"Shannon Breen 74 OL Ht". philadelphiasoul.com. Archived from the original on June 18, 2016. Retrieved June 18, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^"Green Bay Blizzard Roster". ifl.fbstats.pointstreak.com. Archived from the original on June 18, 2016. Retrieved June 17, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^"Bobcat QB signs to go pro". therecorddelta.com. June 21, 2012. Archived from the original on June 18, 2016. Retrieved June 17, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^Swatek, Greg (August 27, 2015). "Honor solidifies Breen's credentials". fredericknewspost.com. Archived from the original on June 18, 2016. Retrieved June 18, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^ ab"2014 TRANSACTIONS". cfl.ca/. Archived from the original on June 18, 2016. Retrieved June 17, 2016.{{cite web}}: CS1 maint: unfit URL (link)
^"TC14: DAY 4 REPORT". montrealalouettes.com. June 4, 2014. Archived from the original on June 18, 2016. Retrieved June 18, 2016.{{cite web}}: CS1 maint: unfit URL (link)
